Not getting Battery performance for nRF52810

[Parag_Pande]

Hi Everyone,

We trying to make Tag using nRF52810 with following expected output

1. The Tag need to send the data at fixed interval (say for every 2 or 3 sec) continuously at particular frequency.

2. The circuit must be well battery optimized.

Now, We have designed the hardware and first we tried the code for esb_tx for nRF52810 which is there in nordic SDK version nRF5SDK16 and at receiving end we are using nRF52DK

and the Transmitting from nRF52810 and receiving to nRF52DK is working fine and correctly.

But we are facing problem on battery life..we are using CR2032 coin cell to power on the Transmitter(nRF52810) but the battery drains completely within just around 48 hours only.

Then we tried our same tag with empty code in it but the result about battery performance is the same.

Please help us regarding the following issues:-

1.How to optimized the battery performance for targeting the battery life about 1 year

2. In our applications we need the change the number of bytes of the transmitted data i.e. in some application we need one byte to get transmitted while in other it would be 4 bytes.

 so please guide us regarding this like where do I need to change in S/W to change the transmitted data.

Please help us ASAP.

Thanks in advanced.

[Hung Bui]

Hi Parag, 

Have you tried with the esb_low_power_ptx example ? 

The default esb_ptx doesn't have any power optimization implemented and the CPU stays active all the time. This explain why you have only 48 hours battery life time. 

The CPU need to be put to sleep when there is no activity. 

To achieve 1 year battery life time on a 200mAh CR2032 coin cell battery, the average current consumption should be around 18uA. 

[Parag_Pande]

Thanks for reply, now i have put esb_low_power_ptx example in nRF52810 tag and esb_low_power_prx code on nrf52DK so please let me know how to check the received data ...because in my debug terminal..  NRF_LOG_DEBUG("Enhanced ShockBurst Receiver Example started."); this statement is also not appering

[Hung Bui]

Please follow the documentation on how to test it. 
The log is disabled in the low power ptx as far as I remember. 

The way to put the CPU to sleep is to call power_manage(), it will wake up if you have an interrupt, for example a button press or a timer interrupt. 

[Parag_Pande]

can you please share the exact document to follow..so that i can understand that how to check received data if I am using esb_low_power_ptx(); at transmitting side

[Hung Bui]

Please follow the documentation of the example here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/esb_examples_low_power_ptx_prx.html?cp=7_1_4_9_0_1

When you press a button on the PTX the PRX should turn on/off a LED.